[BUG] Docker sometimes when startup the perseo-core start slower than perseo-fe and fail with ECONNECTREFUSED

[cesarjorgemartinez]

Docker sometimes when startup the perseo-core start slower than perseo-fe and fail with ECONNECTREFUSED (perseo-fe needs perseo-core startup process)

An analysis is performed and a synchronization between perseo-core and perseo-fe
But this sync has a cost

Other better option is add a minimal delay in perseo-fe startup. Here we can do the following options:

• Inside Dockerfile replace:
  CMD bin/perseo
  by
  CMD sleep 0.5 && bin/perseo

• Replace CMD by an entrypoint script and inside this script, before the bin/perseo startup insert a timeout check:

...
 # Define the entry point
  ENTRYPOINT ["/opt/perseo-fe/perseo-fe-entrypoint.sh"]

The sh

#!/bin/bash

echo "INFO: perseo-fe entrypoint start"

# Use this environment variable:
# PERSEO_CORE_URL=http://${PERSEOCORE_HOST}:${PERSEOCORE_PORT_CONT}
# Use curl or tcping to check

# Current time in seconds
STARTTIME=$(date +%s)
while ! tcping -q -t 1 ${PERSEOCORE_HOST} ${PERSEOCORE_PORT_CONT}
do
  [[ $(($(date +%s) - ${DBTIMEOUT})) -lt ${STARTTIME} ]] || { echo "ERROR: Timeout perseo-core endpoint <${PERSEO_CORE_URL}> Exceeds <${DBTIMEOUT}" >&2; exit 3; }
  echo "INFO: Wait for perseo-core endpoint <${PERSEO_CORE_URL}>"
  sleep 2
done
echo "INFO: It took $(($(date +%s) - ${STARTTIME})) seconds to startup"

echo "INFO: Starting perseo-fe..."
bin/perseo

• Add a nodejs native sleep inside bin/perseo

• We also have a restart always policy containers, but the error would be hidden

[fgalan]

Just to mention that the OnPremise framework has implemented a fix for this, based in tunning the entriypoint for perseo-fe instances in the docker compose .yml file.

Thus, in the OnPremise deployment the problem is solved, although the present issue stills having sense, as a pending fix for non-OnPremise deployments (note that Perseo dockers could be used outside OnPremise also).

[agaldemas]

I solve the issue by setting restart: on-failure for the perseo-fe service in docker-compose.yml
not the cleanest way, but it works !